There are two essential tools at your disposal when it comes to making the most out of an email campaign — recipient feedback data and email analytics. Each and every one of us is unique and will respond differently to different emails, even if those differences are only minor. To ignore this kind of data is a recipe for disaster. At the end of the day, email marketing is all about trial and error. Learning what works and what doesn't will eventually allow you to push your email conversions to the next level.